Acoustic emission studies on thermal spray materials

Chung Kwei Lin, Christopher C. Berndt

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Acoustic emission (AE) has been used to assess the integrity of ceramic coatings. The early studies enabled cracking mechanisms to be qualitatively assessed so that comparative studies of coating behavior could be formulated. The present work examines a quantitative assessment of crack populations and crack sizes so that more detailed analyses of "crack density functions" can evolve for mechanistic studies of thermal spray materials. Coatings and solid deposits of thermally sprayed ceramic have been tested with the stress oriented in directions perpendicular and parallel to the spray direction. It has been determined that macrocracking with catastrophic failure occurs in the perpendicular orientation; whereas several distinct crack populations, consisting of micro- and macrocracking events, are observed for the parallel orientation.

Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalSurface and Coatings Technology
Volume102
Issue number1-2
Publication statusPublished - Apr 1 1998
Externally publishedYes

    Fingerprint

Keywords

  • Acoustic emission
  • Coatings
  • Cracking mechanisms
  • Energy distribution
  • Statistical analysis

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Surfaces and Interfaces

Cite this